Act I. Square in front of the house of _Dulcinée_, whose beauty people

praise in song. Into the midst of the throng ride _Don Quichotte_ and his comical companion, _Sancho_. Night and moonlight. _Don Quichotte_ serenades _Dulcinée_, arousing the jealousy of _Juan_, a lover of the professional beauty, who now appears and prevents a duel. She is amused by the avowals of _Don Quichotte_, and promises to become his beloved if he will recover a necklace stolen from her by brigands.